78336779874 has 16 divisors (see below), whose sum is σ = 156676403712. Its totient is φ = 26111785968.

The previous prime is 78336779863. The next prime is 78336779981. The reversal of 78336779874 is 47897763387.

It is a super-2 number, since 2×78336779874² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78336779799 and 78336779808.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 447672 + ... + 597564.

It is an arithmetic number, because the mean of its divisors is an integer number (9792275232).

Almost surely, 2^78336779874 is an apocalyptic number.

78336779874 is an abundant number, since it is smaller than the sum of its proper divisors (78339623838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78336779874 is a wasteful number, since it uses less digits than its factorization.

78336779874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237001.

The product of its digits is 298722816, while the sum is 69.

The spelling of 78336779874 in words is "seventy-eight billion, three hundred thirty-six million, seven hundred seventy-nine thousand, eight hundred seventy-four".